/Engine/Source/Runtime/MeshDescription/Public/MeshDescriptionBase.h
Returns the vertices adjacent to this vertex
void GetVertexAdjacentVertices ( [FVertexID](API\Runtime\MeshDescription\FVertexID) VertexID, [TArray](API\Runtime\Core\Containers\TArray)< [FVertexID](API\Runtime\MeshDescription\FVertexID) > & OutAdjacentVertexIDs ) const